20967013 has 8 divisors (see below), whose sum is σ = 22116320. Its totient is φ = 19822320.

The previous prime is 20966993. The next prime is 20967041. The reversal of 20967013 is 31076902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20967013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20967043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12331 + ... + 13927.

It is an arithmetic number, because the mean of its divisors is an integer number (2764540).

Almost surely, 2^20967013 is an apocalyptic number.

It is an amenable number.

20967013 is a deficient number, since it is larger than the sum of its proper divisors (1149307).

20967013 is a wasteful number, since it uses less digits than its factorization.

20967013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20967013 is about 4578.9751036668. The cubic root of 20967013 is about 275.7478837876.

It can be divided in two parts, 2096701 and 3, that added together give a square (2096704 = 1448²).

The spelling of 20967013 in words is "twenty million, nine hundred sixty-seven thousand, thirteen".